Click image to view original
Vedeneyev M14PF
The Vedeneyev M14PF is a Russian nine-cylinder, four-stroke, air-cooled radial engine. The Russian National Team began asking for more power and the result was the M14PF in which the power is increased to 400hp by changing the supercharger gearbox so that the supercharger is turned at 10.5 times engine speed rather than 8.25. This therefore uses the same supercharger and other systems, but turns the supercharger impeller at an extremely high 30,000 rpm in order to produce the higher levels of boost necessary for greater power.
General characteristics
Type: Nine cylinder, four-stroke, air-cooled radial engine
Bore: 105 mm (4.13 in.)
Stroke: 130 mm (5.11 in.)
Displacement: 10.16 L (620 cubic inches )
Length: 923 mm (36.375 in)
Diameter: 985 mm (38.7 in)
Dry weight: 220 kg (485 lb)
Components
Supercharger: Centrifugal, single-stage, single-speed
Fuel system: Floatless carburettor
Fuel type: Minimum 91 octane Avgas
Oil system: Gear type pump
Cooling system: Air-cooled
Performance
Power output: 400 HP at 2,950 rpm